JP7371814B2 - Landing door switch circuit - Google Patents

Description

The present disclosure relates to a landing door switch circuit applied to a one-shaft double car elevator.

In general, elevators are defined as "devices that prevent the car from being raised or lowered unless the car and all entrance doors of the hoistway are closed" (Japanese domestic law: Building Standards Act and Article 129 of the Enforcement Order of the Act). 9). For this reason, a landing door switch circuit in which switches provided at all landing doors are connected in series to a switch has conventionally been used. The contacts of this switch are connected to the motor of the hoisting machine, and when all the doors are closed, the coil of the switch is energized to close the contacts.

On the other hand, a one-shaft double car elevator has been proposed in which multiple cars are installed one above the other in one hoistway. Due to the structure of such elevators, the lower car cannot be moved to a floor higher than the floor where the upper car is located, and the upper car cannot be moved to a floor below the floor where the lower car is located. cannot be moved. However, when a conventionally used switch circuit is used, even if the door of a landing on a floor where one car cannot move is opened, the car cannot run.

Patent Document 1 discloses a double car elevator that uses a landing detection switch to bypass a switch provided at the landing door when one car has landed on the floor when the landing door opens. is disclosed. In this double car elevator, even if the landing door is opened on the floor where one car has landed, the switch of the landing door is bypassed, and as a result, the hoist motor is Since the car will be supplied with electricity, the other car can run.

Japanese Patent Application Publication No. 2000-128453

However, even with the double car elevator described in Patent Document 1, if the door of a landing on a floor other than the one on which one car is opened opens, even if the door on which the door opened is Even if the car is on a floor that cannot be moved, the other car will not be able to run.

The present disclosure has been made in view of the above-mentioned problems, and provides a landing door switch circuit for a double car elevator that prevents cars from running when the landing door is opened. To provide a landing door switch circuit that allows the other car to run even when the door of a landing on a floor where a car cannot move is opened.

A landing door switch circuit according to this disclosure has an upper car and a lower car in one hoistway, and a plurality of landing door switch circuits for moving back and forth between the upper car or the lower car and landings set for each of a plurality of floors. In a landing door switch circuit applied to an elevator system having a landing door, the upper car coil, which is an excitation coil provided in the switch of the upper car power source that drives the upper car, is connected to the power source, and the upper car coil is connected to the power source. A plurality of landing door switches are connected in series between the service coil and the power source, and are installed corresponding to the landing, and are turned on when the door is closed and turned off when the door is open. An upper car safety circuit having a main circuit for the upper car, and a first connection section branched from the main circuit for the upper car corresponding to the landing where the landing door switch is provided; or connected to a power source, and has a second connecting part provided on the lower car and electrically connected to the first connecting part when the lower car faces the landing, and the first connecting part and the second connecting part. is installed in the upper car auxiliary circuit that bypasses the landing door switch on the floor below the floor where the lower car is located, and in the lower car power supply switch that drives the lower car when the lower car is electrically connected. The lower car coil, which is an excitation coil, is connected to a power source, and a plurality of landing door switches provided corresponding to the landings are connected in series between the lower car coil and the power source. a safety circuit for the lower car, which has a circuit and a third connection branched from the main circuit for the lower car corresponding to the landing where the landing door switch is provided, and one side is connected to the coil or power supply for the lower car. and, on the other hand, a fourth connecting part that is provided on the upper car and electrically connects to the third connecting part when the upper car faces the landing, and the third connecting part and the fourth connecting part are connected. The lower car auxiliary circuit bypasses the landing door switch on the floor above the floor where the upper car is located.

According to the present disclosure, in a landing door switch circuit for a double car elevator that prevents a car from traveling when the landing door opens, the presence of one car prevents the other car from moving at the landing door of a floor. Even if the other car is opened, it is possible to provide a landing door switch circuit that allows the other car to run.

1 is a schematic diagram of an elevator apparatus including a landing door switch circuit in Embodiment 1. FIG. FIG. 2 is a circuit configuration diagram of an elevator apparatus in Embodiment 1. FIG. FIG. 2 is a circuit configuration diagram of a landing door switch circuit in Embodiment 1. FIG. FIG. 2 is a schematic diagram of an elevator apparatus including a landing door switch circuit according to a second embodiment. FIG. 3 is a circuit configuration diagram of a landing door switch circuit in Embodiment 2. FIG. FIG. 6 is a partially enlarged view of the circuit configuration of the landing door switch circuit in Embodiment 2; FIG. 7 is a circuit configuration diagram of a landing door switch circuit in Embodiment 3;

Embodiment 1.
EMBODIMENT OF THE INVENTION Below, the elevator apparatus provided with the landing door switch circuit based on Embodiment 1 is demonstrated based on drawing.

First, the configuration of this landing door switch circuit and elevator system will be explained using FIGS. 1 to 3. FIG. 1 is a schematic diagram of an elevator apparatus equipped with a landing door switch circuit according to the first embodiment. In the following description, an elevator system installed in an eight-story building from the first floor (1F) to the eighth floor (8F) shown in FIG. 1 will be described as an example.

The elevator apparatus according to this embodiment is a one-shaft double car elevator that has an upper car 14 and a lower car 18 in one hoistway 11. Further, this elevator device has a plurality of landing doors for moving back and forth between the upper car 14 or the lower car 18 and landings set for each of the plurality of floors. A landing door switch circuit is provided so that the upper car 14 and the lower car 18 cannot run when the landing door is in an open state.

The landing door switch circuit includes an upper car safety circuit 20 and an upper car auxiliary circuit 30, which are circuits for the upper car 14, and a lower car safety circuit 40 and a lower car auxiliary circuit 50, which are circuits for the lower car 18. It is equipped with

The upper car safety circuit 20 includes an upper car main circuit 20a and a plurality of first connections 22b to 22g. The upper car main circuit 20a is connected at one end to the power supply 60 and at the other end to an excitation coil 23b and an excitation coil 24b (not shown in FIG. 1). The excitation coil 23b and the excitation coil 24b are excitation coils provided in a switch of the upper car hoist drive power source, which is the upper car power source, and are upper car coils. As will be explained in detail later, the excitation coil 23b is an excitation coil for the main contact 23a of a switch provided between the three-phase AC power supply 61 used for operating the elevator system and the upper car hoist motor 75. be. Further, the excitation coil 24b is an excitation coil for the main contact 24a of the switch provided between the three-phase AC power supply 61 and the upper car hoisting machine brake coil 77. The switch including the main contact 23a and the switch including the main contact 24a are switches for the upper car hoist drive power source that drives the upper car 14.

The upper car main circuit 20a includes, in order from the one closest to the power supply 60, the second floor upper car landing door switch 21b, the third floor upper car landing door switch 21c, and the fourth floor upper car landing door switch. 21d, 5th floor upper car landing door switch 21e, 6th floor upper car landing door switch 21f, 7th floor upper car landing door switch 21g, and 8th floor upper car landing door switch 21h are connected in series. has been done. In the following description, unless there is a particular distinction, it will simply be referred to as the upper car landing door switch 21. The upper car landing door switch 21 is provided corresponding to the landing, and each code from b to h corresponds to the floors of the landing from the second floor to the eighth floor.

The upper car landing door switch 21 is a switch that is turned on when the landing door is closed and turned off when the door is open. In this embodiment, a normally closed contact with a forced release contact is used.

The first connection portion 22 is a branch from the upper car main circuit 20a corresponding to the landing where the upper car landing door switch 21 is provided, and in this embodiment, the first connection portion 22 is a branch of the upper car main circuit 20a. It is a receiving device.

The first connection portion 22 branches from the upper car main circuit 20a at a position farther from the power supply 60 than the upper car landing door switch 21 provided at each landing. In this embodiment, the first connecting portion 22b on the second floor, the first connecting portion 22c on the third floor, the first connecting portion 22d on the fourth floor, the first connecting portion 22e on the fifth floor, and the first connecting portion on the sixth floor. 22f, and a first connection portion 22g on the seventh floor. Each code from b to g corresponds to the same landing floor as the upper car landing door switch 21 from the second floor to the seventh floor. In the following description, unless otherwise specified, it will simply be referred to as the first connecting portion 22.

The upper car auxiliary circuit 30 is connected to the power source 60 on one side and has a second connection portion 31 on the other side. The second connection section 31 is a transmitting device of a non-contact power supply device provided in the lower car 18. When the lower car 18 faces the landing, the first connecting portion 22 and the second connecting portion 31 are electrically connected. When the first connecting portion 22 and the second connecting portion 31 are connected, the upper car auxiliary circuit 30 connects to the upper car landing area of the floor below the floor where the lower car 18 of the upper car safety circuit 20 is located. The door switch 21 will be bypassed.

For example, when the lower car 18 stops at the fourth floor as shown in FIG. 1, the first connecting portion 22d and the second connecting portion 31 are electrically connected. Therefore, the upper car landing door switch 21d, the upper car landing door switch 21c, and the upper car landing door switch 21b, which are the upper car landing door switches 21 for the fourth floor and below where the lower car 18 is located, are for the upper car. Bypassed by auxiliary circuit 30.

Therefore, even if the landing doors on the 4th floor where the lower car 18 stopped and the 2nd and 3rd floors, which are floors below the 4th floor, are opened and the upper car landing door switch 21 is turned off, the upper car Power is supplied from the power supply 60 to the excitation coil 23b and the excitation coil 24b by the auxiliary circuit 30. Therefore, even in such a case, the upper car 14 can run.

Next, the lower car safety circuit 40 and the lower car auxiliary circuit 50 will be explained. The lower car safety circuit 40 and the lower car auxiliary circuit 50 have the same configuration as the upper car safety circuit 20 and the upper car auxiliary circuit 30.

The lower car safety circuit 40 includes a lower car main circuit 40a and a plurality of third connections 42b to 42g. One side of the lower car main circuit 40a is connected to the power source 60, and the other side is connected to an excitation coil 43b and an excitation coil 44b (not shown in FIG. 1). The excitation coil 43b and the excitation coil 44b are excitation coils provided in a switch of a lower car hoist drive power source, which is a lower car power source, and are lower car coils. As will be described in detail later, the excitation coil 43b is an excitation coil for the main contact 43a of the switch provided between the three-phase AC power supply 61 and the lower car hoist motor 85. Further, the excitation coil 44b is an excitation coil for the main contact 44a of the switch provided between the three-phase AC power supply 61 and the lower car hoisting machine brake coil 87. The switch including the main contact 43a and the switch including the main contact 44a are switches for the lower car hoist drive power source that drives the lower car 18.

The lower car main circuit 40a includes, in order from the one closest to the power source 60, a lower car landing door switch 41g on the 7th floor, a lower car landing door switch 41f on the 6th floor, and a lower car landing door switch on the 5th floor. 41e, 4th floor lower car landing door switch 41d, 3rd floor lower car landing door switch 41c, 2nd floor lower car landing door switch 41b, and 1st floor lower car landing door switch 41a are connected in series. has been done. In the following description, if no particular distinction is made, it will simply be referred to as the lower car landing door switch 41. The lower car landing door switch 41 is provided corresponding to the landing, and the symbols a to g correspond to the landings from the first floor to the seventh floor.

The lower car landing door switch 41, like the upper car landing door switch 21, is a switch that is turned on when the landing door is closed and turned off when the door is open. In this embodiment, a normally closed contact with a forced release contact is used.

The third connection portion 42 is a branch from the lower car main circuit 40a corresponding to the landing where the lower car landing door switch 41 is provided, and in this embodiment, the third connection portion 42 is a branch of the lower car main circuit 40a. It is a receiving device.

The third connection portion 42 branches from the lower car main circuit 40a at a position farther from the power source than the lower car landing door switch 41 provided at each landing. In this embodiment, the third connection section 42b on the second floor, the third connection section 42c on the third floor, the third connection section 42d on the fourth floor, the third connection section 42e on the fifth floor, and the third connection section on the sixth floor. 42f, and a third connecting portion 42g on the seventh floor. Each code from b to g corresponds to the same landing floor as the lower car landing door switch 41 from the second floor to the seventh floor. In the following description, unless otherwise specified, it will simply be referred to as the third connecting portion 42.

The lower car auxiliary circuit 50 is connected to the power source 60 on one side and has a fourth connection portion 51 on the other side. The fourth connection portion 51 is a transmitting device of a non-contact power supply device provided in the upper car 14. When the upper car 14 faces the landing, the third connecting portion 42 and the fourth connecting portion 51 are electrically connected. When the third connection part 42 and the fourth connection part 51 are connected, the lower car auxiliary circuit 50 is connected to the lower car safety circuit 40 for the lower car on a floor higher than the floor where the upper car 14 is located. The landing door switch 41 will be bypassed.

Next, the circuit configuration of the entire elevator apparatus according to the present embodiment will be described using FIG. 2. FIG. 2 is a circuit diagram of the elevator system.

The three-phase AC power supply 61 is connected to an upper car AC reactor 73, a lower car AC reactor 83, an upper car hoisting machine brake power supply circuit 63, and a lower car hoisting machine brake power supply circuit through a power circuit breaker 62. 64. The three-phase AC power source 61 is an upper car hoist drive power source that drives the upper car 14 and is also a lower car hoist drive power source that drives the lower car 18.

The upper car AC reactor 73 is connected to the upper car power converter 74 via the main contact 23a of the switch. The upper car power converter 74 is connected to the upper car hoist motor 75 of the upper car hoist 76 . A rope to which the upper car 14 and a counterweight 79 are attached is wound around the upper car hoist 76, and is braked by two upper car hoist brakes 77c and 77d. This rope is also wound around the deflection wheel 78.

The lower car AC reactor 83 is connected to the lower car power converter 84 via the main contact 43a of the switch. The lower car power converter 84 is connected to the lower car hoist motor 85 of the lower car hoist 86 . A rope to which the lower car 18 and a counterweight 89 are attached is wound around the lower car hoist 86, and is braked by two lower car hoist brakes 87c and 87d. This rope is also wound around the deflection wheel 88.

The upper car hoisting machine brake power supply circuit 63 is connected to the two upper car hoisting machine brake coils 77a and 77b via the main contact 24a of the switch. The upper car hoisting machine brake coil 77a and the upper car hoisting machine brake coil 77b are coils provided in the upper car hoisting machine brake 77c and the upper car hoisting machine brake 77d, respectively. Further, the lower car hoisting machine brake power supply circuit 64 is connected to two lower car hoisting machine brake coils 87a and 87b via the main contact 44a of the switch. The lower car hoisting machine brake coil 87a and the lower car hoisting machine brake coil 87b are coils provided in the lower car hoisting machine brake 87c and the lower car hoisting machine brake 87d, respectively.

Next, the circuit configuration of the landing door switch circuit according to this embodiment will be explained using FIG. 3. FIG. 3 is a circuit diagram of the landing door switch circuit. Similar to FIG. 1, FIG. 3 shows a circuit when the upper car 14 is parked on the 7th floor and the lower car 18 is parked on the 4th floor.

As described using FIG. 1, the upper car main circuit 20a, the upper car auxiliary circuit 30, the lower car main circuit 40a, and the lower car auxiliary circuit 50 are connected to the power supply 60.

The upper car main circuit 20a is connected to the excitation coil 23b and the excitation coil 24b, and the upper car landing door switch 21 is connected in series with the power supply 60. Furthermore, in addition to the upper car landing door switch 21, a plurality of other safety switches 26 are connected. The safety switch 26 is, for example, a switch that is turned on when the car door is closed and turned off when the door is open.

The lower car main circuit 40a is connected to an excitation coil 43b and an excitation coil 44b, and a lower car landing door switch 41 is connected in series with the power supply 60. Furthermore, in addition to the lower car landing door switch 41, a plurality of other safety switches 46 are connected similarly to the upper car main circuit 20a.

An upper car control circuit 25 is connected to the switches each equipped with an excitation coil 23b and an excitation coil 24b. A lower car control circuit 45 is connected to each switch including an excitation coil 43b and an excitation coil 44b.

A second connecting portion 31 (not shown) of the upper car auxiliary circuit 30 is electrically connected to a first connecting portion 22d branched off at a position farther from the power source 60 than the upper car landing door switch 21d (also not shown). . Similarly, a fourth connecting portion 51 (not shown) of the lower car auxiliary circuit 50 is electrically connected to a third connecting portion 42g branched off at a position farther from the power source 60 than the lower car landing door switch 41g (also not shown). ing.

Next, the operation of this embodiment will be explained.

When the upper car 14 is run, the upper car control circuit 25 outputs a command to turn on the main contacts 23a and 24a. At this time, the main contact 23a and the main contact 24a cannot be turned on unless power is supplied from the power supply 60 to the excitation coil 23b and the excitation coil 24b, respectively.

When the upper car landing door switch 21 and the safety switch 26 provided in the upper car main circuit 20a are all in the ON state, power is supplied from the power supply 60 to the excitation coil 23b and the excitation coil 24b. On the other hand, when even one of the upper car landing door switch 21 and the safety switch 26 connected in series is in the off state, the upper car main circuit 20a supplies power from the power supply 60 to the excitation coil 23b and the excitation coil 24b. Can not do it.

Here, when the second connection part 31 of the upper car auxiliary circuit 30 and the first connection part 22 branched from the upper car main circuit 20a are connected, the power of the power source 60 is It is supplied from the section 31 to the first connecting section 22 . Therefore, the upper car landing door switch 21 of the floor below the floor where the lower car 18 is parked is connected between the first connection part 22 connected to the second connection part 31 and the power supply 60, that is, the upper car landing door switch 21 of the floor below the floor where the lower car 18 is parked. It is bypassed by the auxiliary circuit 30. Therefore, even if the upper car landing door switch 21, which is bypassed by the upper car auxiliary circuit 30, is turned off, the power from the power supply 60 will be supplied to the excitation coil 23b and the excitation coil 24b. Become.

The same applies to the lower car 18.

When the lower car 18 is run, the lower car control circuit 45 outputs a command to turn on the main contacts 43a and 44a. At this time, the main contact 43a and the main contact 44a cannot be turned on unless power from the power supply 60 is supplied to the excitation coil 43b and the excitation coil 44b, respectively.

When the lower car landing door switch 41 and the safety switch 46 provided in the lower car main circuit 40a are all in the ON state, power is supplied from the power supply 60 to the excitation coil 43b and the excitation coil 44b. On the other hand, when even one of the lower car landing door switch 41 and the safety switch 46 connected in series is in the off state, the lower car main circuit 40a supplies power from the power supply 60 to the excitation coil 43b and the excitation coil 44b. Can not do it.

Here, when the fourth connection part 51 of the lower car auxiliary circuit 50 and the third connection part 42 branched from the lower car main circuit 40a are connected, the power of the power source 60 is transferred to the fourth connection part 51 of the lower car auxiliary circuit 50. It is supplied from the section 51 to the third connecting section 42 . Therefore, between the third connection part 42 connected to the fourth connection part 51 and the power supply 60, that is, the lower car landing door switch 41 of the floor higher than the floor where the upper car 14 is parked, It is bypassed by the auxiliary circuit 50. Therefore, even if the lower car landing door switch 41, which is bypassed by the lower car auxiliary circuit 50, is turned off, power from the power source 60 will be supplied to the excitation coil 43b and the excitation coil 44b. .

As described above, according to the present embodiment, in the landing door switch circuit of a double car elevator that prevents a car from running when the landing door opens, the presence of one car prevents the other car from moving on a floor. It is possible to provide a landing door switch circuit that allows the other car to run even when the door of the other car is opened.

More specifically, in this embodiment, by providing the fourth connection part 51 of the lower car auxiliary circuit 50 and the second connection part 31 of the upper car auxiliary circuit 30 in the upper car 14 and the lower car 18, respectively, Each of the lower car landing door switch 41 and the upper car landing door switch 21 can be bypassed with one circuit.

Therefore, even if a specialist engineer opens the landing door on a floor where one car cannot move due to its presence on a certain floor, the other car can still run. It is. This risk of a worker accidentally falling into the hoistway by opening a door on a floor where the other car cannot be moved due to the structure of a general elevator where there is only a single car in the hoistway. This is equivalent to opening the door of a landing on a floor where the car is not parked when the car is parked. Therefore, in such a case, it is not necessarily necessary to prevent the other car from operating.

Further, according to the present embodiment, the lower car landing door switch 41 and the upper car landing door switch 21 to be bypassed are determined depending on the positions of the upper car 14 and the lower car 18. Therefore, in order to identify the landing door switch to be bypassed, there is no need to individually input information on the landing door switches on each floor into a control device equipped with a control circuit. Further, it is not necessary to use the control device to specify the landing door switch to be bypassed based on the position of the car and output a command to bypass the specified landing door switch. Therefore, a receiver circuit that takes in the information of the landing door switch, a calculation necessary for specification, and an output circuit necessary for outputting the command are unnecessary. Therefore, the landing door switch circuit according to the present embodiment is particularly useful in an elevator system installed in a high-rise building with many floors. This is because, in the case of a high-rise building, a large amount of wiring is required to output a command to bypass the landing door switch provided on each floor.

In this embodiment, the upper car landing door switch 21 and the lower car landing door switch 41 are provided on the first floor of the upper car main circuit 20a and on the eighth floor of the lower car main circuit 40a. do not have. This is because the upper car 14 and the lower car 18 cannot be moved to the 1st floor and the 8th floor, respectively, so even if the landing door is open, it may not be unsafe.

Embodiment 2.
In this embodiment, when the door of the landing on the first floor, which is the lowest floor, is open, the upper car 14 and the lower car 18 are closed, except when the lower car 18 is parked on the first floor. This is the landing door switch circuit that prevents the vehicle from running. Hereinafter, differences from Embodiment 1 will be mainly explained. First, the configuration of this embodiment will be explained using FIGS. 4 to 6. FIG. 4 is a schematic diagram of an elevator system including the landing door switch circuit of this embodiment.

The landing door switch circuit of this embodiment includes a bottom floor safety circuit 90 in addition to the upper car safety circuit 20. In this embodiment, as in the first embodiment, the upper car safety circuit 20 is provided with the upper car landing door switch 21 and the first connection part 22 on the first floor, which is the lowest floor. do not have. The lowest floor safety circuit 90 is a circuit that has a lowest floor main circuit 90a and a fifth connection portion 92, in which an upper car landing door switch 91 is connected in series on the first floor, which is the lowest floor.

FIG. 5 is a circuit configuration diagram of the landing door switch circuit according to this embodiment. FIG. 6 is a partially enlarged view of the portion surrounded by the dotted line in FIG.

The lowest floor safety circuit 90 has a lowest floor main circuit 90a and a fifth connection portion 92. The bottom floor main circuit 90a connects the power supply 60 and excitation coils 93b and 94b, which are excitation coils of relay contacts 93a and 94a, which will be explained later, and connects the upper car corresponding to the landing door on the bottom floor between them. The landing door switches 91 are connected in series.

The fifth connection part 92 is a branch from the lowest floor main circuit 90a corresponding to the first floor, which is a landing where the upper car landing door switch 91 is provided, and in this embodiment, it is a non-contact connection part 92. This is a receiving device of a power feeding device. The fifth connection portion 92 branches from the bottom floor main circuit 90a at a position farther from the power source than the upper car landing door switch 91. Further, like the first connection part 22, the fifth connection part 92 is electrically connected to the second connection part 31 when the lower car 18 faces the landing on the first floor.

The upper car main circuit 20a of the upper car safety circuit 20 further includes a relay contact 93a and a relay contact 94a between the power supply 60 and the excitation coils 23b and 24b. Relay contact 93a and relay contact 94a are normally open contacts that are turned on when excitation coil 93b and excitation coil 94b are excited, respectively.

In addition, the excitation coil 93b and the excitation coil 94b are relays that are mechanically configured so that a normally open contact and a normally closed contact are not turned on at the same time (for example, a relay with forced guide contacts according to IEC 61810-3). ) coil. In this embodiment, contacts other than the relay contacts 93a and 94a are connected to the upper car main circuit 20a and the lower car main circuit 40a.

FIG. 6 shows a circuit in which a normally open contact 93c corresponding to a relay contact 93a and a normally open contact 94c corresponding to a relay contact 94a are connected in series to the upper car main circuit 20a and the lower car main circuit 40a, An operation stop circuit 95 is connected in parallel with a circuit in which a normally closed contact 93d corresponding to the relay contact 93a and a normally closed contact 94d corresponding to the relay contact 94a are connected in series, and is connected in series with a landing door switch or the like. It means that there is.

The relay contacts 93a and 93c, which are normally open contacts, and the normally closed contact 93d are mechanically configured so that they are not turned on at the same time by a forced guide (not shown). Similarly, the relay contacts 94a and 94c, which are normally open contacts, and the normally closed contact 94d are also configured to be mechanically prevented from being turned on at the same time by forced guides.

Next, the operation of this embodiment will be explained.

When the first floor landing door is closed, the first floor upper car landing door switch 91 is turned on in the lowest floor safety circuit, and power from the power source 60 is supplied to the excitation coil 93b and the excitation coil 94b to excite them. be done. By exciting the excitation coil 93b and the excitation coil 94b, the relay contact 93a and the relay contact 94a of the upper car main circuit 20a are turned on.

At this time, if the other upper car landing door switch 21 and safety switch 26 of the upper car safety circuit 20 are in the ON state or are bypassed by the upper car auxiliary circuit 30, the excitation coil 23b and the excitation coil 24b Power from a power source 60 is supplied. Therefore, the upper car control circuit 25 can cause the upper car 14 to travel.

On the other hand, when the landing door on the first floor is in an open state and the fifth connection part 92 and the second connection part 31 are not connected, the power from the power source 60 is supplied to the excitation coil 93b and the excitation coil 94b. Therefore, the excitation coil 93b and the excitation coil 94b are not excited. Therefore, the relay contacts 93a and 94a of the upper car main circuit 20a are turned off. Therefore, regardless of the states of other switches provided in the upper car main circuit 20a, power from the power source 60 is not supplied to the excitation coil 23b and the excitation coil 24b. Therefore, the upper car control circuit 25 cannot cause the upper car 14 to travel.

Furthermore, even when the landing door on the first floor is in an open state, if the fifth connecting portion 92 and the second connecting portion 31 are connected, that is, if the lower car 18 is facing the landing on the first floor. If so, the upper car landing door switch 91 is bypassed by the upper car auxiliary circuit 30. Therefore, power from the power source 60 is supplied to the excitation coil 93b and the excitation coil 94b, and the excitation coil 93b and the excitation coil 94b are excited. Therefore, the relay contact 93a and the relay contact 94a are turned on in the same way as when the landing door on the first floor is in the closed state, so that the upper car control circuit 25 can cause the upper car 14 to travel.

Further, if the relay contact 93a or the relay contact 94a is stuck in the ON state and fails, the operation stop circuit 95 cuts off the supply of power from the power source 60 to the upper car main circuit 20a and the lower car auxiliary circuit 50. . Therefore, the excitation coil 23b, the excitation coil 24b, the excitation coil 43b, and the excitation coil 44b are not excited, and the upper car 14 and the lower car 18 come to a stop.

As described above, according to the present embodiment, when the door of the landing on the first floor, which is the lowest floor, is open, the upper car 14 and the lower car 18 are parked on the first floor. The lower car 18 can be made inoperable.

At the lowest floor of the hoistway 11, it is conceivable that a worker opens the landing door and works inside the hoistway 11. In such a case, even if the upper car 14 is on the lowest floor, where the upper car 14 cannot exist, there is a possibility that the counterweight 79 will come into contact with the worker. Therefore, when the lower car 18 is not stopped at the lowest floor and the landing door on the lowest floor is opened, there is an advantage that the upper car 14 stops running.

Embodiment 3.
This embodiment is a landing door switch circuit that prevents the other car from running when one car is running, even if the running car is facing the landing. Hereinafter, differences from Embodiment 2 will be mainly explained. FIG. 7 is a circuit configuration diagram of the landing door switch circuit according to this embodiment.

In this embodiment, the upper car auxiliary circuit 30 is provided with a normally closed auxiliary contact 43c and a normally closed auxiliary contact 44c of a switch of a lower car power source, each of which has a main contact 43a and a main contact 44a. . The normally closed auxiliary contact 43c and the normally closed auxiliary contact 44c are excited by the excitation coil 43b and the excitation coil 44b, respectively.

The normally closed auxiliary contacts 43c and the normally closed auxiliary contacts 44c are connected to the main contacts 43a and 44c by the lower car control circuit 45 when power is supplied from the power supply 60 to the excitation coil 43b and the excitation coil 44b. When a command to turn the main contact 44a on is output, the main contact 43a and the main contact 44a are contacts that switch from the on state to the off state, contrary to the main contact 43a and the main contact 44a.

Similarly, the lower car auxiliary circuit 50 is provided with a normally closed auxiliary contact 23c and a normally closed auxiliary contact 24c of the switch of the upper car power source, which are provided with main contacts 23a and 24a, respectively. The normally closed auxiliary contact 23c and the normally closed auxiliary contact 24c are excited by the excitation coil 23b and the excitation coil 24b, respectively.

When power is supplied from the power supply 60 to the excitation coil 23b and the excitation coil, the normally closed auxiliary contacts 23c and the normally closed auxiliary contacts 24c are connected to the main contacts 23a and the main contacts by the upper car control circuit 25. When a command to turn the contact 24a on is output, the main contact 23a and the main contact 24a are contacts that switch from the on state to the off state, contrary to the main contact 23a and the main contact 24a.

Next, the operation of this embodiment will be explained.

When the lower car 18 is running, that is, when the main contacts 43a and 44a are in the ON state, the normally closed auxiliary contacts 43c and the normally closed auxiliary contacts 44c are in the OFF state. Therefore, the upper car auxiliary circuit 30 cannot supply power from the power source 60 from the second connection part 31 to the first connection part 22, and cannot bypass the upper car landing door switch 21.

Therefore, even if there is a moment when the lower car 18 faces the landing and the first connection part 22 and the second connection part 31 are electrically connected, the floor where the lower car 18 is located while the lower car 18 is traveling When the landing door is open on a floor below the floor, the upper car 14 cannot run. The supply of power to the excitation coil 23b and the excitation coil 24b in the upper car main circuit 20a is cut off by the upper car landing door switch 21 when the door is open, and the power supply to the excitation coil 23b and the excitation coil 24b in the upper car auxiliary circuit 30 is interrupted. This is because the supply of power to the excitation coil 24b is interrupted by the normally closed auxiliary contact 23c and the normally closed auxiliary contact 24c.

Similarly, when the upper car 14 is running, that is, when the main contacts 23a and 23a are in the on state, the normally closed auxiliary contacts 23c and the normally closed auxiliary contacts 24c are in the off state. Therefore, the lower car auxiliary circuit 50 cannot supply power from the power source 60 from the fourth connection part 51 to the third connection part 42, and cannot bypass the lower car landing door switch 41.

Therefore, even if there is a moment when the upper car landing door switch 21 faces the landing and the third connection part 42 and the fourth connection part 51 are electrically connected, when the upper car 14 is running, the upper car landing door switch 21 faces the landing. When the landing door is open on a floor higher than the floor where the lower car 14 is located, the lower car 18 cannot run. Power supply to the excitation coil 43b and excitation coil 44b in the lower car main circuit 40a is cut off by the lower car landing door switch 41 when the door is open, and the excitation coil 43b and excitation coil in the lower car main circuit 40a are cut off by the lower car landing door switch 41. This is because power supply to the coil 44b is cut off by the normally closed auxiliary contact 43c and the normally closed auxiliary contact 44c.

As described above, according to the present embodiment, when one car is running, the other car can be prevented from running even if the running car faces a landing.

Although the embodiment has been described above, the present disclosure is not limited to this embodiment. Modifications will be shown below.

In the embodiment, one of the upper car auxiliary circuit 30 and the lower car auxiliary circuit 50 was connected to the power source 60. However, in order to solve the problem, one may be connected to the excitation coil 23b and the excitation coil 24b, and the excitation coil 43b and the excitation coil 44b instead of the power supply 60.

In this case, in the upper car main circuit 20a and the lower car main circuit 40a, the distances from the landing door switch and the first connection part 22 or the third connection part 42 from the power supply 60 are reversed.

For example, if the upper car auxiliary circuit 30 is connected to the excitation coil 23b and the excitation coil 24b, the upper car landing door switch of the floor below the floor where the lower car 18 is located, as in the embodiment. 21, the order of the upper car landing door switch 21 and the first connection portion 22 in the upper car main circuit 20a must be reversed.

Specifically, in the upper car main circuit 20a, the upper car landing door switch 21b on the 2nd floor, the upper car landing door switch 21b on the 3rd floor, and the upper car landing door switch 21b on the 3rd floor in order from the side farthest from the power supply 60, that is, from the side closest to the excitation coil 23b and the exciting coil 24b. Door switch 21c, 4th floor upper car landing door switch 21d, 5th floor upper car landing door switch 21e, 6th floor upper car landing door switch 21f, 7th floor upper car landing door switch 21g, and 8 The landing door switch 21h for the upper car on the floor is connected in series. The first connection portion 22 branches from the upper car main circuit 20a at a location closer to the power source 60 than the upper car landing door switch 21 provided at each landing. Further, the safety switch 26 is provided closer to the power source 60 than the upper car landing door switch 21b on the second floor.

In the embodiment, the first connection section 22, the second connection section 31, the third connection section 42, the fourth connection section 51, and the fifth connection section 92 are a reception device or a transmission device of a non-contact power supply device. . However, in order to solve the problem, the connection may be made mechanically.

In the second and third embodiments, the upper car auxiliary circuit 30 and the lower car auxiliary circuit 50 are provided with the operation stop circuit 95, but they may not be provided.

11 hoistway, 14 upper car, 18 lower car, 20 upper car safety circuit, 20a upper car main circuit, 21, 21b, 21c, 21d, 21e, 21f, 21g, 21h upper car landing door switch, 22, 22, 22c, 22d, 22E, 22f, 22g first connection part, 23a main contact, 23b excitation coil, 23c normally closed auxiliary contact, 24a main contact, 24b excitation coil, 24c normally closed auxiliary contact, 25 upper car control circuit , 26 safety switch, 30 auxiliary circuit for upper car, 31 second connection section, 40 safety circuit for lower car, 40a main circuit for lower car, 41, 41a, 41b, 41c, 41d, 41e, 41f, 41g for lower car Landing door switch, 42, 42b, 42c, 42d, 42e, 42f, 42g Third connection part, 43a main contact, 43b excitation coil, 43c normally closed auxiliary contact, 44a main contact, 44b excitation coil, 44c normally closed auxiliary contact, 45 lower car control circuit, 46 safety switch, 50 lower car auxiliary circuit, 51 fourth connection section, 60 power supply, 61 three-phase AC power supply, 62 power breaker, 63 upper car hoisting machine brake power circuit, 64 Lower car hoisting machine brake power supply circuit, 73 Upper car AC reactor, 74 Upper car power converter, 75 Upper car hoisting machine motor, 76 Upper car hoisting machine, 77, 77a, 77b Upper car use Hoisting machine brake coil, 77c, 77d Hoisting machine brake for upper car, 78 Deflection wheel, 79 Counterweight, 83 AC reactor for lower car, 84 Power converter for lower car, 85 Hoisting machine motor for lower car, 86 Lower car hoisting machine, 87, 87a, 88b Lower car hoisting machine brake coil, 87c, 87d Lower car hoisting machine brake, 88 Deflection wheel, 89 Counterweight, 90 Bottom floor safety circuit, 90a Bottom Floor main circuit, 91 Upper car landing door switch, 92 Fifth connection, 93a Relay contact, 93b Excitation coil, 93c Normally open contact, 93d Normally closed contact, 94a Relay contact, 94b Exciting coil, 94c Normally open contact, 94d Normally closed contact, 95 operation stop circuit

Claims (4)

Applicable to elevator equipment that has an upper car and a lower car in one hoistway, and has a plurality of landing doors for going back and forth between the upper car or the lower car and landings set for each of multiple floors. In the landing door switch circuit,
An upper car coil, which is an excitation coil provided in a switch of the upper car power source that drives the upper car, is connected to a power source, and a coil corresponding to the landing area is connected between the upper car coil and the power source. a main circuit for an upper car in which a plurality of landing door switches are connected in series, and the landing door switches are connected in series and are turned on when the landing door is closed and turned off when the door is open; an upper car safety circuit having a first connection part branched from the upper car main circuit corresponding to the provided landing;
One side is connected to the upper car coil or the power source, and the other side is a second connection part provided on the lower car and electrically connected to the first connection part when the lower car faces the landing. an auxiliary circuit for an upper car, which bypasses the landing door switch of a floor below the floor where the lower car exists when the first connection part and the second connection part are electrically connected; ,
A lower car coil, which is an excitation coil provided in a switch of a lower car power source that drives the lower car, is connected to the power source, and a coil corresponding to the landing area is connected between the lower car coil and the power source. a lower car main circuit in which a plurality of landing door switches are connected in series, and a third connection branched from the lower car main circuit corresponding to the landing where the landing door switches are installed. a lower car safety circuit having a section;
One side is connected to the lower car coil or the power supply, and the other side is a fourth connection part provided on the upper car and electrically connected to the third connection part when the upper car faces the landing. and an auxiliary circuit for a lower car that bypasses the landing door switch on a floor higher than the floor where the upper car exists when the third connection part and the fourth connection part are electrically connected. ,
Landing door switch circuit with. The upper car main circuit does not have a landing door switch corresponding to the lowest floor landing connected in series, and has a relay contact between the upper car coil and the power source,
A bottom floor main circuit connects the lowest floor coil, which is an excitation coil of the relay contact, to the power source, and connects in series the landing door switch corresponding to the lowest floor landing; Further comprising a bottom floor safety circuit corresponding to the landing and having a fifth connection part branched from the bottom floor main circuit,
The second connection part is electrically connected to the fifth connection part,
The upper car auxiliary circuit bypasses the landing door switch provided at the lowest floor landing when the fifth connecting portion and the second connecting portion are electrically connected. Landing door switch circuit described. The upper car auxiliary circuit has a normally closed auxiliary contact of the lower car power supply switch,
The landing door switch circuit according to claim 1 or 2, wherein the lower car auxiliary circuit has a normally closed auxiliary contact of a switch of the upper car power source. One of the first connection section and the second connection section is a receiving device of a non-contact power supply device, and the other is a transmitting device of the non-contact power supply device,
The landing area according to any one of claims 1 to 3, wherein one of the third connection part and the fourth connection part is a receiving device of a non-contact power supply device, and the other is a transmitting device of the non-contact power supply device. Door switch circuit.

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